CN109821084B - It is a kind of that shaftless heart pump can plant based on flow passage gradual change - Google Patents
It is a kind of that shaftless heart pump can plant based on flow passage gradual change Download PDFInfo
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Abstract
本发明涉及一种基于流道渐变的可植入无轴心脏泵，其特征在于，包括流道进口外壳、定子和流道出口外壳依次轴向固定连接，所述流道进口外壳和流道出口外壳的壳腔内壁部位分别设有直通段部，所述直通段部的内端口分别与收缩段部的外端口过渡连接，所述收缩段部的内端口分别设置在定子的外端口；所述流道进口外壳壳腔内壁部位和流道出口外壳壳腔内壁部位的型线均为椭圆型线。所述流道进口外壳和流道出口外壳内径的收缩段部均靠近定子的一侧设置；所述定子内壁位置固定安装有定子线圈，所述定子线圈的中部设置有叶轮转子，所述叶轮转子通过两端的永磁悬浮轴承轴被固定。本发明具有体积小、流量大和发热量小的优点，能够有效降低血栓形成的几率。
The invention relates to an implantable shaftless heart pump based on the gradual change of the flow channel, which is characterized in that it comprises a flow channel inlet shell, a stator and a flow channel outlet shell which are sequentially fixedly connected in an axial direction, and the flow channel inlet shell and the flow channel outlet The inner wall of the shell cavity of the shell is respectively provided with straight-through sections, the inner ports of the straight-through sections are transitionally connected with the outer ports of the contracted sections, and the inner ports of the contracted sections are respectively arranged at the outer ports of the stator; The profiles of the inner wall of the shell cavity at the inlet of the runner and the inner wall of the shell cavity at the outlet of the runner are all elliptical profiles. The shrinkage sections of the inner diameters of the runner inlet casing and the runner outlet casing are all set close to one side of the stator; the inner wall of the stator is fixedly installed with a stator coil, and the middle part of the stator coil is provided with an impeller rotor, and the impeller rotor The shaft is fixed by permanent magnetic suspension bearings at both ends. The invention has the advantages of small volume, large flow rate and low calorific value, and can effectively reduce the probability of thrombus formation.
Description
技术领域technical field
本发明属于流体机械及轴流泵技术领域，特别是涉及一种基于流道渐变的可植入无轴心脏泵。The invention belongs to the technical field of fluid machinery and axial flow pumps, in particular to an implantable shaftless heart pump based on gradual change of flow path.
背景技术Background technique
现有公知的叶片式心脏泵的结构主要有轴流式和离心式，这两种叶片式心脏泵的叶片叶尖部位与流道内壁不可避免的留有间隙，形成较大的剪切力，损伤红细胞，造成凝血、血栓等不良后果。如中国专利申请CN 105169504 A公开了一种磁液耦合式被动悬浮轴流血泵，采用枣核型的剖面结构，进口与出口过流面积小，血液与叶轮表面、流道内壁表面接触面积大，叶轮室处的体积大，叶片做功时发热量大，易造成血栓等不良后果；中国专利申请201110366578.5公开了一种紧凑型轴流式磁悬浮人工心脏泵，虽然结构紧凑，但是过流面积小，需要较高的电机转速才能达到需要的血流量和血压，在较高的转速下，血细胞更容易被切割至破碎，使溶血症状加剧反而降低了血液的生理功能；同时增加转速将带来发热量大、能耗高等问题。The structures of the existing known vane heart pumps mainly include axial flow type and centrifugal type. In these two kinds of vane heart pumps, there is inevitably a gap between the tip of the vane and the inner wall of the flow channel, forming a large shear force. Damage red blood cells, resulting in adverse consequences such as coagulation and thrombus. For example, Chinese patent application CN 105169504 A discloses a magnetic-fluid coupling passive suspension axial flow blood pump, which adopts a jujube core-shaped cross-sectional structure, has a small flow area between the inlet and outlet, and has a large contact area between the blood and the surface of the impeller and the inner wall of the flow channel. , the volume of the impeller chamber is large, and the heat generated by the blades is large, which may easily cause adverse consequences such as thrombus; Chinese patent application 201110366578.5 discloses a compact axial-flow magnetic levitation artificial heart pump. Although the structure is compact, the flow area is small. A higher motor speed is required to achieve the required blood flow and blood pressure. At a higher speed, the blood cells are more likely to be cut and broken, which intensifies the symptoms of hemolysis and reduces the physiological function of the blood; at the same time, increasing the speed will bring heat problems such as large size and high energy consumption.
发明内容Contents of the invention
本发明的目的是为克服现有技术所存在的不足而提出一种基于流道渐变的可植入无轴心脏泵，本发明具有体积小、流量大和发热量小的优点，能够有效降低血栓形成的几率。The purpose of the present invention is to propose an implantable shaftless heart pump based on the gradual change of the flow channel in order to overcome the shortcomings of the prior art. The present invention has the advantages of small volume, large flow rate and low calorific value, and can effectively reduce thrombus formation. probability.
根据本发明提出的一种基于流道渐变的可植入无轴心脏泵，其特征在于，包括流道进口外壳、定子和流道出口外壳依次轴向固定连接，所述流道进口外壳和流道出口外壳的壳腔内壁部位分别设有直通段部，所述直通段部的内端口分别与收缩段部的外端口过渡连接，所述收缩段部的内端口分别设置在定子的外端口；According to the present invention, an implantable shaftless heart pump based on flow channel gradual changes is characterized in that it includes a flow channel inlet housing, a stator and a flow channel outlet housing that are sequentially fixedly connected in an axial direction, and the flow channel inlet housing and the flow channel The inner wall of the shell cavity of the channel outlet shell is respectively provided with straight-through sections, the inner ports of the straight-through sections are transitionally connected with the outer ports of the constricted sections, and the inner ports of the constricted sections are respectively set at the outer ports of the stator;
所述流道进口外壳壳腔内壁部位的型线为进口椭圆型线，以叶轮中心为椭圆长轴的一个端点，流道进口外壳与进口导叶的进水边的交点为椭圆短轴的一个端点，进口椭圆型线的参数方程为：所述流道出口外壳壳腔内壁部位的型线为椭圆型线，以叶轮中心为椭圆长轴的一个端点，流道出口外壳与出口导叶(11)的出水边的交点为椭圆短轴的一个端点，出口椭圆型线的参数方程为：其中:x为椭圆型线的横坐标值、y为椭圆型线的纵坐标值、a为椭圆型线的长轴长、b为椭圆型线的短轴长；The shape line of the inner wall of the inlet casing of the runner is the inlet ellipse shape, with the center of the impeller as an end point of the major axis of the ellipse, and the intersection point of the inlet casing of the runner and the water inlet edge of the inlet guide vane is one of the minor axes of the ellipse End point, the parametric equation of the inlet ellipse is: The shape line of the inner wall of the shell cavity of the flow path outlet shell is an ellipse shape line, with the center of the impeller as an end point of the long axis of the ellipse, and the intersection point of the flow path exit shell and the water outlet edge of the outlet guide vane (11) is the short axis of the ellipse. An endpoint, the parametric equation of the exit ellipse is: Wherein: x is the abscissa value of the ellipse profile, y is the ordinate value of the ellipse profile, a is the major axis length of the ellipse profile, and b is the minor axis length of the ellipse profile;
所述定子的内壁设置定子线圈，所述定子线圈的中部设置叶轮转子，所述叶轮转子通过两端的永磁悬浮轴承分别与流道进口外壳和流道出口外壳轴向固定连接；The inner wall of the stator is provided with a stator coil, and the middle part of the stator coil is provided with an impeller rotor, and the impeller rotor is axially fixedly connected with the flow channel inlet casing and the flow channel outlet casing through the permanent magnetic suspension bearings at both ends;
所述叶轮转子的外壁与叶轮转子线圈固定连接，所述叶轮转子线圈与定子线圈之间设有装配间隙；The outer wall of the impeller rotor is fixedly connected to the impeller rotor coil, and an assembly gap is provided between the impeller rotor coil and the stator coil;
所述流道进口外壳和流道出口外壳的收缩段部的最小直径与叶轮转子的直径相等；The minimum diameter of the constricted section of the inlet casing of the flow passage and the outlet casing of the flow passage is equal to the diameter of the impeller rotor;
所述流道进口外壳的内壁设有绕流道进口外壳中心均匀分布的多个进口导叶，所述进口导叶与设置在流道进口外壳中心位的进口导叶轮毂连接，所述流道出口外壳的内壁设有绕流道出口外壳中心均匀分布的多个出口导叶，所述出口导叶与设置在流道出口外壳中心位的出口导叶轮毂连接，所述叶轮转子的内壁设有多个叶轮叶片。The inner wall of the inlet casing of the flow channel is provided with a plurality of inlet guide vanes evenly distributed around the center of the inlet casing of the flow channel. The inner wall of the outlet casing is provided with a plurality of outlet guide vanes evenly distributed around the center of the outlet casing of the flow channel, and the outlet guide vanes are connected with the outlet guide vane hub arranged at the center of the outlet casing of the flow channel, and the inner wall of the impeller rotor is provided with Multiple impeller blades.
本发明与现有技术相比其显著优点在于：Compared with the prior art, the present invention has significant advantages in that:
第一，本发明提出的一种基于流道渐变的可植入无轴心脏泵，其结构简单、设计合理，通过在流道进口外壳和流道出口外壳的壳腔内壁部位设置直通段部和收缩段部，能够改变血液流速，对间隙具有良好的冲刷效果，避免了血栓的形成，具有流量大、体积小和发热量小的显著优点。First, the present invention proposes an implantable shaftless heart pump based on a gradual change in the flow channel, which has a simple structure and a reasonable design. The contraction section can change the blood flow velocity, has a good flushing effect on the gap, avoids the formation of thrombus, and has the remarkable advantages of large flow rate, small volume and low heat generation.
第二，本发明提出的一种基于流道渐变的可植入无轴心脏泵，使其叶片与流道内壁成为一个整体，降低了叶顶间隙切割血细胞的概率，使溶血症状得到有力的缓解，由于没有叶轮轮毂，增大血液的过流面积的同时减小了叶轮室的体积，使心脏泵朝着轻量化、小型化发展，并能减少叶片做功时的发热量，有效降低血栓形成的几率。Second, the invention proposes an implantable shaftless heart pump based on the gradual change of the flow channel, which integrates the blades and the inner wall of the flow channel, reduces the probability of cutting blood cells in the blade top gap, and effectively relieves the symptoms of hemolysis , because there is no impeller hub, the volume of the impeller chamber is reduced while increasing the blood flow area, so that the heart pump is developed towards light weight and miniaturization, and can reduce the calorific value of the blades when they do work, effectively reducing the risk of thrombus formation probability.
附图说明Description of drawings
图1为本发明的一种基于流道渐变的可植入无轴心脏泵的结构示意图。FIG. 1 is a schematic structural view of an implantable shaftless heart pump based on a gradual change in flow path of the present invention.
图2为本发明的一种基于流道渐变的可植入无轴心脏泵的血液流动方向示意图。Fig. 2 is a schematic diagram of the blood flow direction of an implantable shaftless heart pump based on the gradual change of the flow channel of the present invention.
图3为本发明的一种基于流道渐变的可植入无轴心脏泵的壳腔内壁部位椭圆型线渐变示意图。Fig. 3 is a schematic diagram of the elliptical line gradient of the inner wall of the casing cavity of an implantable shaftless heart pump based on the gradual change of the flow channel of the present invention.
附图编号说明：流道进口外壳1、进口导叶2、定子3、紧固螺钉4、叶轮叶片5、定子线圈6、叶轮转子7、叶轮转子线圈8、永磁悬浮轴承9、流道出口外壳10、出口导叶11、出口导叶轮毂12、进口导叶轮毂13。Explanation of the attached drawing numbers: flow channel inlet housing 1, inlet guide vane 2, stator 3, fastening screw 4, impeller blade 5, stator coil 6, impeller rotor 7, impeller rotor coil 8, permanent magnetic suspension bearing 9, flow channel outlet housing 10. Outlet guide vane 11, outlet guide vane hub 12, and inlet guide vane hub 13.
具体实施方式Detailed ways
下面将结合附图和实施例对本发明的具体实施方式做进一步的详细描述。The specific implementation manners of the present invention will be further described in detail below in conjunction with the drawings and embodiments.
实施例。结合图1-3，本发明提出的一种基于流道渐变的可植入无轴心脏泵，包括流道进口外壳1、定子3和流道出口外壳10依次轴向固定连接，所述流道进口外壳1和流道出口外壳10的壳腔内壁部位分别设有直通段部，所述直通段部的内端口分别与收缩段部的外端口过渡连接，所述收缩段部的内端口分别设置在定子3的外端口；所述流道进口外壳1壳腔内壁部位的型线为进口椭圆型线(如图3所示)，以叶轮中心为椭圆长轴的一个端点，流道进口外壳1与进口导叶2的进水边的交点为椭圆短轴的一个端点，进口椭圆型线的参数方程为：所述流道出口外壳10壳腔内壁部位的型线为椭圆型线(如图3所示)，以叶轮中心为椭圆长轴的一个端点，流道出口外壳10与出口导叶11的出水边的交点为椭圆短轴的一个端点，出口椭圆型线的参数方程为：其中:x为椭圆型线的横坐标值、y为椭圆型线的纵坐标值、a为椭圆型线的长轴长、b为椭圆型线的短轴长；Example. 1-3, the present invention proposes an implantable shaftless heart pump based on flow channel gradual changes, including flow channel inlet casing 1, stator 3 and flow channel outlet casing 10, which are sequentially fixedly connected in an axial direction, and the flow channel The inner walls of the inlet casing 1 and the flow path outlet casing 10 are respectively provided with straight-through sections, the inner ports of the straight-through sections are transitionally connected with the outer ports of the constricted sections, and the inner ports of the constricted sections are respectively provided with At the outer port of the stator 3; the profile of the inner wall of the cavity of the runner inlet housing 1 is an inlet elliptical profile (as shown in Figure 3), with the center of the impeller as an end point of the long axis of the ellipse, the runner inlet housing 1 The point of intersection with the water inlet edge of the inlet guide vane 2 is an endpoint of the minor axis of the ellipse, and the parametric equation of the inlet ellipse is: The profile of the inner wall of the channel outlet housing 10 is an elliptical profile (as shown in Figure 3 ), with the center of the impeller as an end point of the long axis of the ellipse, the outlet edge of the channel outlet housing 10 and the outlet guide vane 11 The intersection point of is an endpoint of the minor axis of the ellipse, and the parametric equation of the exit ellipse is: Wherein: x is the abscissa value of the ellipse profile, y is the ordinate value of the ellipse profile, a is the major axis length of the ellipse profile, and b is the minor axis length of the ellipse profile;
所述定子3的内壁设置定子线圈6，所述定子线圈6的中部设置叶轮转子7，所述叶轮转子7通过两端的永磁悬浮轴承9分别与流道进口外壳1和流道出口外壳10轴向固定连接；The inner wall of the stator 3 is provided with a stator coil 6, and the middle part of the stator coil 6 is provided with an impeller rotor 7, and the impeller rotor 7 is axially connected to the flow channel inlet casing 1 and the flow channel outlet casing 10 respectively through the permanent magnetic suspension bearings 9 at both ends. fixed connection;
所述叶轮转子7的外壁与叶轮转子线圈8固定连接，所述叶轮转子线圈8与定子线圈6之间设有装配间隙；The outer wall of the impeller rotor 7 is fixedly connected to the impeller rotor coil 8, and an assembly gap is provided between the impeller rotor coil 8 and the stator coil 6;
所述流道进口外壳1和流道出口外壳10的收缩段部的最小直径与叶轮转子7的直径相等；The minimum diameter of the constricted sections of the runner inlet housing 1 and the runner outlet housing 10 is equal to the diameter of the impeller rotor 7;
所述定子3的内壁设置定子线圈6，所述定子线圈6的中部设置叶轮转子7，所述叶轮转子7通过两端的永磁悬浮轴承9分别与流道进口外壳1和流道出口外壳10轴向固定连接；The inner wall of the stator 3 is provided with a stator coil 6, and the middle part of the stator coil 6 is provided with an impeller rotor 7, and the impeller rotor 7 is axially connected to the flow channel inlet casing 1 and the flow channel outlet casing 10 respectively through the permanent magnetic suspension bearings 9 at both ends. fixed connection;
所述叶轮转子7的外壁与叶轮转子线圈8固定连接，所述叶轮转子线圈8与定子线圈6之间设有装配间隙；The outer wall of the impeller rotor 7 is fixedly connected to the impeller rotor coil 8, and an assembly gap is provided between the impeller rotor coil 8 and the stator coil 6;
所述流道进口外壳1和流道出口外壳10的收缩段部的最小直径与叶轮转子7的直径相等；The minimum diameter of the constricted sections of the runner inlet housing 1 and the runner outlet housing 10 is equal to the diameter of the impeller rotor 7;
所述流道进口外壳1的内壁设有绕流道进口外壳1中心均匀分布的多个进口导叶2，所述进口导叶2与设置在流道进口外壳1中心位的进口导叶轮毂13连接，所述流道出口外壳10的内壁设有绕流道出口外壳10中心均匀分布的多个出口导叶11，所述出口导叶11与设置在流道出口外壳10中心位的出口导叶轮毂12连接，所述叶轮转子7的内壁设有多个叶轮叶片5。The inner wall of the channel inlet housing 1 is provided with a plurality of inlet guide vanes 2 evenly distributed around the center of the channel inlet housing 1, and the inlet guide vanes 2 and the inlet guide vane hub 13 arranged at the center of the channel inlet housing 1 connected, the inner wall of the flow channel outlet housing 10 is provided with a plurality of outlet guide vanes 11 evenly distributed around the center of the flow channel outlet housing 10, and the outlet guide vanes 11 are connected with the outlet guide vanes arranged at the center of the flow channel outlet housing 10 The hub 12 is connected, and the inner wall of the impeller rotor 7 is provided with a plurality of impeller blades 5 .
本发明提出的一种基于流道渐变的可植入无轴心脏泵的进一步优选方案是：A further preferred solution of the implantable shaftless heart pump based on the gradual change of the flow channel proposed by the present invention is:
所述流道进口外壳1通过紧固螺钉4固定在定子3的一端部位，所述流道出口外壳10通过紧固螺钉4固定在定子3另一端部位。The flow channel inlet shell 1 is fixed on one end of the stator 3 by fastening screws 4 , and the flow channel outlet shell 10 is fixed on the other end of the stator 3 by fastening screws 4 .
所述流道进口外壳1与定子3的连接处设有密封装置，所述流道出口外壳10与定子3的连接处设置有密封装置。A sealing device is provided at the connection between the flow channel inlet casing 1 and the stator 3 , and a sealing device is provided at the connection between the flow channel outlet casing 10 and the stator 3 .
所述进口导叶2的数量为3-7枚，所述出口导叶11的数量为3-7枚，所述叶轮叶片5的数量为3-6枚。The number of the inlet guide vanes 2 is 3-7 pieces, the number of the outlet guide vanes 11 is 3-7 pieces, and the number of the impeller blades 5 is 3-6 pieces.
所述进口导叶2、出口导叶11以及叶轮叶片)的叶片个数互为质数。The number of blades of the inlet guide vane 2, the outlet guide vane 11 and the impeller blades) are mutually prime numbers.
所述进口导叶轮毂13的轴向长度小于流道进口外壳1直通段部的长度，所述出口导叶轮毂12的轴向长度小于流道出口外壳10直通段部的长度。The axial length of the inlet guide vane hub 13 is less than the length of the straight-through section of the flow channel inlet housing 1 , and the axial length of the outlet guide vane hub 12 is less than the length of the straight-through section of the flow channel outlet housing 10 .
所述进口导叶轮毂13的直径为流道进口外壳1直通段部内壁直径的1/8-1/6，所述出口导叶轮毂12的直径为流道出口外壳10直通段部内壁直径的1/8-1/6，出口导叶轮毂12长度大于进口导叶轮毂13长度。The diameter of the inlet guide vane hub 13 is 1/8-1/6 of the inner wall diameter of the straight-through section of the inlet housing 1 of the flow channel, and the diameter of the outlet guide vane hub 12 is 1/8 of the inner wall diameter of the straight-through section of the flow channel outlet housing 10. 1/8-1/6, the length of the outlet guide vane hub 12 is greater than the length of the inlet guide vane hub 13 .
所述流道进口外壳1、流道出口外壳10、定子3、进口导叶2、出口导叶11、叶轮叶片5、进口导叶轮毂13以及出口导叶轮毂12的材质均为不导磁材质。The materials of the flow channel inlet housing 1, the flow channel outlet housing 10, the stator 3, the inlet guide vane 2, the outlet guide vane 11, the impeller blade 5, the inlet guide vane hub 13 and the outlet guide vane hub 12 are all non-magnetic materials .
所述不导磁材质为碳合金。The non-magnetic material is carbon alloy.
所述进口导叶2出口旋向与叶轮叶片5进口旋向相同，所述叶轮叶片5出口旋向与出口导叶11进口旋向相同。The direction of rotation of the outlet of the inlet guide vane 2 is the same as that of the inlet of the impeller blade 5 , and the direction of rotation of the outlet of the impeller blade 5 is the same as that of the inlet of the outlet guide vane 11 .
结合图3，本发明提出的一种基于流道渐变的可植入无轴心脏泵的工作原理是：叶轮转子线圈8通电之后直接驱动叶轮叶片5旋转，血液从流道进口外壳1的入口进入，从流道出口外壳10的出口导出，血液在流经该心脏泵的过程中，其过流面积随着心脏泵的内部结构变化而变化，具体为过流通道首先从流道进口外壳1的直通段进入，在靠近叶轮室时逐渐收缩，到叶轮室入口处过流面积最小，血液经过叶轮叶片5做功之后向流道出口外壳10流动，过流面积逐渐放大，然后经过流道出口外壳10的直通段部，经出口导叶11整流流出。具体来说，流道进口外壳1进口段壳腔内壁部位的型线为呈逐渐收缩形状的椭圆型线，过流面逐渐变窄，使得血液流速加快，对流道进口外壳1与叶轮转子7之间的间隙有良好的冲刷效果，避免血栓的形成；血液自叶轮室流出后进入出口导叶11之前，出口导叶11内壁逐渐扩大，使血液流量增加，压强降低，流速增加，对因叶轮转子7与出口导叶11外壳之间的间隙所产生的溶血亦有良好的冲刷效果；经出口导叶11整流后，血液压强逐渐增加，最终从出口流出。With reference to Fig. 3, the working principle of an implantable shaftless heart pump based on the gradual change of the flow channel proposed by the present invention is: after the impeller rotor coil 8 is powered on, the impeller blades 5 are directly driven to rotate, and the blood enters from the inlet of the flow channel inlet shell 1 , is derived from the outlet of the flow channel outlet housing 10. When blood flows through the heart pump, its flow area changes with the internal structure of the heart pump. Specifically, the flow channel first flows from the flow channel inlet housing 1. The straight-through section enters, and gradually shrinks when it is close to the impeller chamber, and the flow area at the entrance of the impeller chamber is the smallest. After the blood passes through the impeller blades 5 and does work, it flows to the flow channel outlet shell 10, and the flow area gradually enlarges, and then passes through the flow channel exit shell 10 The straight-through section is rectified and flowed out by the outlet guide vane 11. Specifically, the profile line of the inner wall of the shell cavity of the inlet section of the channel inlet shell 1 is an elliptical line in a gradually shrinking shape, and the flow surface is gradually narrowed, so that the blood flow speed is accelerated. The gap between them has a good flushing effect to avoid the formation of thrombus; after the blood flows out of the impeller chamber and before it enters the outlet guide vane 11, the inner wall of the outlet guide vane 11 gradually expands, which increases the blood flow, reduces the pressure, and increases the flow rate. The hemolysis produced by the gap between 7 and the shell of the outlet guide vane 11 also has a good flushing effect; after being rectified by the outlet guide vane 11, the blood pressure gradually increases and finally flows out from the outlet.
根据本发明提出的一种基于流道渐变的可植入无轴心脏泵，下面进一步公开本发明部件的设计要求如下：According to the implantable shaftless heart pump based on the gradual change of the flow path proposed by the present invention, the design requirements of the components of the present invention are further disclosed as follows:
本发明的可植入无轴心脏泵的各部件材料应采用生物相容性较好的合金材料如：钛合金等。The material of each component of the implantable shaftless heart pump of the present invention should be an alloy material with better biocompatibility, such as titanium alloy and the like.
本发明的可植入无轴心脏泵的叶轮转子7直径在10mm-30mm之间，具体应根据个体的血流量来确定。叶轮转子7转速应在10000r/min-30000r/min，具体应根据个体的血液粘稠度来确定。The diameter of the impeller rotor 7 of the implantable shaftless heart pump of the present invention is between 10 mm and 30 mm, which should be determined according to the individual blood flow. The rotating speed of the impeller rotor 7 should be 10000r/min-30000r/min, which should be determined according to the blood viscosity of the individual.
本发明的可植入无轴心脏泵的叶轮叶片5个数与进口导叶2叶片的个数之间应为互质的关系，不得出现叶轮叶片5与进口导叶2叶片的个数相同或成整倍数的情况。叶轮叶片5个数与出口导叶11叶片的个数之间应为互质的关系，不得出现叶轮叶片5与出口导叶11叶片的个数相同或成整倍数的情况，否则有发生共振的可能。The number of 5 impeller blades of the implantable shaftless heart pump of the present invention and the number of inlet guide vane 2 blades should be a mutual prime relationship, and the number of impeller blades 5 and inlet guide vane 2 blades must not be the same or Integer multiples. There should be a mutual prime relationship between the number of impeller blades 5 and the number of outlet guide vanes 11 blades, and the number of impeller blades 5 and outlet guide vanes 11 blades must not be the same or an integral multiple, otherwise resonance may occur possible.
本发明的可植入无轴心脏泵的叶轮转子7直径与叶轮转子7转速的乘积不应大于375，否则有发生空化的可能。The product of the diameter of the impeller rotor 7 and the rotational speed of the impeller rotor 7 of the implantable shaftless heart pump of the present invention should not be greater than 375, otherwise cavitation may occur.
本发明的具体实施方式中未涉及的说明属于本领域公知的技术，可参考公知技术加以实施。The descriptions not involved in the specific embodiments of the present invention belong to the well-known technologies in the art, and may be implemented with reference to the known technologies.
本发明经反复试验验证，取得了满意的试用效果。The invention has been verified through repeated tests and has achieved satisfactory trial results.
以上具体实施方式及实施例是对本发明提出的一种基于流道渐变的可植入无轴心脏泵技术思想的具体支持，不能以此限定本发明的保护范围，凡是按照本发明提出的技术思想，在本技术方案基础上所做的任何等同变化或等效的改动，均仍属于本发明技术方案保护的范围。The above specific implementation methods and examples are specific support for the technical idea of an implantable shaftless heart pump based on the gradual change of the flow channel proposed by the present invention, and cannot limit the scope of protection of the present invention. Any equivalent changes or equivalent changes made on the basis of the technical solution still fall within the protection scope of the technical solution of the present invention.
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| CN111271293A (en) * | 2020-03-14 | 2020-06-12 | 兰州理工大学 | A power unit integrated shaftless screw gas-liquid mixed pump |
| CN111888552B (en) * | 2020-07-06 | 2021-05-18 | 河海大学 | Single-axis variable speed two-stage asynchronous heart pump with differential iterative curve flow channel and method of use |
| CN114183375B (en) * | 2021-11-24 | 2023-05-09 | 江苏大学 | A shaftless axial flow pump |
| CN114159694B (en) * | 2021-12-08 | 2023-11-24 | 北京联合大学 | Magnetic suspension pulsation axial flow type heart pump |
| CN114288547A (en) * | 2021-12-17 | 2022-04-08 | 四川大学华西医院 | Shaftless blood pump |
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| US8419609B2 (en) * | 2005-10-05 | 2013-04-16 | Heartware Inc. | Impeller for a rotary ventricular assist device |
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